60Co集装箱检测系统中的图像处理机

This paper analyzes the features of ⁶⁰Co container inspection image, the design of several special processing methods for container image and some normal processing methods for two-dimensional digital image, including gray enha ncement, pseudo-enhancement, space filter, edge enhancement, geometry process, etc. It gives out the way to carry out the above mentioned processes in Windows 95 or Win NT. It discusses some ways to improve the image processing speed on mi crocomputer and good resalts were obtained.     

转载机调心式收煤装置的设计与应用

针对王家岭煤矿SZZ1350型桥式转载机以往采用人工拆卸收煤板,收煤板效率不高情况,研制出转载机调心式收煤装置。该装置替代传统的人工拆卸收煤板,在转载机上经安装调试后在18106工作面进行了实践应用。该装置减少了6个操作步骤、4名操作工人、40 min操作时间,提高了工作效率。     

如何防止石英石产品开裂及提高韧性的几点建议

本文以石英石为例,详细分析了人造石产品出现开裂现象的影响因素,提出了解决方案;对如何提高石材产品的韧性给出了具体的工艺操作建议。     

深埋大采高综采面采动巷道底鼓机理及控制研究

围岩稳定性是影响煤矿巷道正常使用的关键,巷道底鼓是制约矿井高产高效的关键因素之一。以宁东矿区梅花井煤矿232204辅运顺槽地质条件为背景,采用现场调研、理论分析、数值模拟的方法研究了巷道底鼓机理。研究发现巷道底板无支护和采动影响是巷道底鼓的根本原因,在原支护条件下巷道围岩呈不均匀收缩状态,顺槽发生挤压流动型底鼓。提出了巷道优化支护方案并进行验证。结果表明：巷道底板最大破坏深度为3.2 m,优化支护后,巷道底鼓量由原支护条件下的1150 mm减小到350 mm,两帮对底板软岩产生的“挤压”效应得到了有效缓解,整体围岩系统在“顶-底-帮”优化支护后能实现长期稳定。     

简易润滑站在压缩机组上的应用

针对大型往复式压缩机组布置相对集中、油品加注频繁等特点,介绍一种简易润滑站。该润滑站具有自动补充、加油、退油等诸多功能,而且操作方便、简易可行,解决了现场润滑管理难的问题。     

木材削片机主轴的优化设计

以寻求木材削片机主轴的优化参数为例,展现优化设计原理及实现过程。并根据主轴的实际情况,选择合适的寻优方法,进而确定最优解。     

无刷双馈电机ABC到dq坐标变换的DSP算法

根据坐标变换的功率不变变换原则,得出了无刷双馈电机从ABC到αβ坐标系和从αβ坐标系到dq坐标系变换的算法模型,并在这两种算法的基础上,采用DSP芯片TMS320F2812,写出了它们的DSP子程序,并通过了编译和运行。     

A Novel Approach for Warhead Fragments Velocity Measurement Based on Laser Screen

The velocity of warhead fragment is key criteria to determine its mutilation efficiency.We have designed an optoelectronic system to accurately measure the average velocity of warhead fragments.The apparatus including two parallel laser screens spaced apart at a known fixed distance for providing time measurement start and stop signals.The large effective screen area is formed by laser source,retro-reflector and large area photo-diode with a central hole.Whenever a moving fragment interrupts two optical screen,the corresponding photometers senses the event,due to partial obscuration of the incident energy.Experiments have been performed to measure velocity of the different kinds of projectiles and fragments within various size and velocity ranges,including 7.62 mm bullet shooting experiments,prefabricated steel-ball exploding experiments.They were proved that the system is adequate to measure the velocity of larger than 5 mm,less than 1 000 m/s in the range,when fixed trajectory,test the velocity of the projectile average relative deviation is less than 4.21%.The system can perform satisfactorily with a lot of advantages such as larger effective light screen area,quick response speed,low uncertainty,strong repetition and reliability,etc.     

硅微陀螺仪的正交误差分析

推导了双框架式硅微陀螺仪驱动模态和检测模态的运动方程，定义了驱动位移和敏感位移。在此基础上，利用弹性主轴原理，分别推导了内外框弹性主轴偏转产生的正交误差信号表达式及正交误差信号和敏感信号的比值表达式。分析结果表明，双框架式硅微陀螺仪内外框弹性主轴发生偏转时，都将产生正交误差位移，且双框架式硅微陀螺仪产生的正交误差位移数值相当于单框架式硅微陀螺仪正交误差位移的两倍。测定了双框架式硅微陀螺仪的正交误差，正交误差信号，其值为431°／s，此时偏转角度仅为0．0196°。     

不同后处理对挖掘中制备的PMPNd—123超导性能的影响

研究了不同后处理（Ａｒ,Ｏ２）对在空气中制备的“粉末熔化处理法”（ＰＭＰ）Ｎｄ－１２３超导性能的影响。结果显示,先进行高温氩气处理可以增加Ｎｄ－１２３在随后氧处理过程中的吸氧量,并使其△Ｔ变窄,Ｊｅ升高。低温氢气处理有一温限Ｔｌｉｍ,高于或太低于此温际均不能有效地增加ＰＭＰＮｄ－１２３的氧含量,此温限大约在６００℃附近。